Scania box and differential oil 113 10 marches

I would like to know which oil carries the box and differential of the scania 113h, the box makes a very suabido sump for the moment, it does in 5th. Low and worrying, the truck is working in the area of ​​La Pampa with hot days of around 35 degrees and the distance it travels are approximately 300km daily with 30tn of load, I hope you can help me and cordial greetings.-